Bloodstone can be categorized into three main types: chicken blood, texture, and weight. Understanding these aspects helps in identifying genuine from fake stones.
1. Fake Chicken Blood: A key indicator of a counterfeit is the absence of silver spots, which are natural in real stones. The color distribution tends to be uneven, with inconsistent line thickness and unnatural patterns. The design often lacks the organic flow that real bloodstone exhibits. With the naked eye, such fakes are usually easy to spot.
2. Texture: Some imitations use plastic compounds or synthetic materials, giving them a lifeless, non-stone-like feel. These fakes may even be sliced and glued onto raw stone surfaces using glue and powdered stone to mimic authenticity. Under strong light, inconsistencies in the color and shape become apparent. Others use stone powder mixed with chemicals to create a false "chicken blood" effect, sometimes using cinnabar or red watercolor for a deceptive look.
3. Weight: Real bloodstone has a consistent and heavier weight compared to fake versions. To test this, you can perform several checks: (1) Rub the stone with fine sandpaper – genuine bloodstone will produce stone dust and may show cinnabar red or fossil-like particles. (2) Carve it with a knife – fake stones made of plastic will crumble easily and feel different. (3) Apply heat – fake stones may emit a burnt plastic smell, while real ones remain odorless. (4) Weigh it in your hand – real stones feel heavier due to their density. (5) Touch the surface – real bloodstone has a cool, stony feel, whereas fakes tend to feel warmer and less substantial.
(Word count: 512)Rectangular prisms(right angle prism) are used to deflect a beam of light through 90 or 180 degrees. This can be used as component to create various optical devices.Rectangular prism/right angle prism is often used in telescope,periscope and other optical system. N-bk7 material can be used for a range between the visible and infrared light. Fused silica material can be used for a range between ultraviolet and infrared light. China star optics offers a wide range of different materials and different degrees of precision prisms, such as Wedge Prism,right angle prism,rhombohedral prism,Dove prism,Penta prism,pyramid prism,dispersing prism etc.
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Specification of our prisms like follow:Â
Material: HK9L Grade A optical glass,Fused Silica JGS1,JGS2,JGS3, or other optical glass materials.
Dimension (mm):1.0-300.0 mm.
Dimension Tolerance(mm): +0.0/-0.2 (General), +0.0,/-0.05(High Precision)
Clear Aperture: >90%
Angle Tolerance: <3 min(General), <3 sec (High Precision)
Flatness@ 633 mm: l/2λ(General), l/4λ(High Precision)
Surface Quality:60/40 (General), 10/5(High Precision)
Bevel(mm): 0.1mm to 0.5 mm
Coating: Uncoated,AR,HR coating etc.
Right Angle Prism,Optical Glass Right Angle Prism,Optical Prisms Kits,High Precision Right Angle Prisms
China Star Optics Technology Co.,Ltd. , https://www.csoptlens.com